Even if this is a small hope, I would suggest to take a look at these papers: Fruit, vegetables, and cancer prevention: A review of the epidemiological evidenc

Even if this is a small hope, I would suggest to take a look at these papers: Fruit, vegetables, and cancer prevention: A review of the epidemiological evidence http://www.tandfonline.com/doi/abs/10.1080/01635589209514201 http://www.tandfonline.com/doi/abs/10.1080/01635589209514201 Vegetables, Fruit, and Cancer Prevention http://www.andjrnl.org/article/S0002-8223%2896%2900273-8/abstract http://www.andjrnl.org/article/S0002-8223%2896%2900273-8/abs... As far as I understood, this is already almost established that increased consumption of fruits and vegetables helps somehow.